At a certain
a certain school it was found that 35% of the 500 boys and 40%
ioved bushwalking. One student from the school is chosen at rand
of the 500 boys and 40% of the 400 girls
resent the event that the student is a girl, and B represent the event
school is chosen at random. Let G
sa girl, and B represent the event that the student
enjoys bushwalking.
Find, correct to two decimal places:
i Pr(G)
ii Pr(BG)
iii Pr(B\G')
iv Pr(BNG)
v Pr(BNG')
b Find Pr(B).
c Hence find:
i Pr(
GB)
ii Pr(G|B')